Summer begins on 1 December across Australia. December 2026 brings the country's hottest, longest-daylight stretch of the year to the southern states, while the tropical north sits inside its wet season, part of the cyclone season that runs from November through to the following April, keeping the north on flood and storm watch through the summer months. Christmas Day falls on 25 December and Boxing Day on 26 December every year, the two fixed holidays of December.
December closes both the fourth calendar quarter of 2026 and the financial year's second quarter, which runs from October to December, on the same date of 31 December. December 2026 also closes the 365-day calendar year itself, resetting every quarterly and annual reporting cycle at once for businesses that report against the calendar year. Christmas Day falls on 25 December and Boxing Day on 26 December every year, the two fixed holidays of December.
December 2026 runs to 31 days and closes the 365-day year on 31 December, the final date of both the fourth calendar quarter and the financial year's second quarter. The new financial year continues uninterrupted into January, not resetting again until the following 1 July, six months after the calendar year itself resets. December is the busiest trading month of the year for Australian retail and hospitality.
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